Subj : Re: pthread_timed_wait
To   : comp.programming.threads
From : Maciej Sobczak
Date : Wed Jun 01 2005 06:44 pm

Michael H Lees wrote:

> However, I don't know if it's my implementation but if I call timed wait 
> with a time in the past the function returns EINVAL.

If this is really true, then this is a bug in the implementation.
The reason is that for any timeout value, every call to the wait 
function could be already late - this is because some other thread might 
take over the CPU *before* you call the wait function and for the time 
long enough to make your timeout already in the past.

> Is a abstime less than the system time an invalid time?

Certainly not, for the above reasons.
On my machine (kernel 2.4) the pthread_cond_timedwait returns ETIMEDOUT 
when the given time was already in the past.

-- 
Maciej Sobczak : http://www.msobczak.com/
Programming    : http://www.msobczak.com/prog/

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